A One-Round Living Greyhawk Shield Lands Regional Adventure
From the introduction:
Several months ago Pathfinders reestablished contact with the town of Ringland, long thought to have fallen to the Old One and his evil minions. Since then, regular communication has been established and troops, including Pathfinders, have been sent to garrison the town's defenses. You have been ordered to relieve some of the Pathfinders currently in Ringland and spend one week under Lord Reyneld's command.
An adventure for characters level 3 - 10.